package com.bwie.filter;

import com.alibaba.cloud.commons.lang.StringUtils;
import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jwts;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.annotation.Order;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

import java.util.concurrent.TimeUnit;

/**
 * @Author: zhaijiaqi
 * @Date: 2025/6/20 10:27
 * @Description:
 **/
@Configuration
@Order(1)
public class MyGolBalFilter implements GlobalFilter  {
    @Autowired
    StringRedisTemplate redisTemplate;
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        //获取参数
        ServerHttpRequest request = exchange.getRequest();
        ServerHttpResponse response = exchange.getResponse();
        String url = request.getURI().getPath();
        System.out.println("获取参数"+url);
        //获取白名单
        if(url.contains("/login")){
            System.out.println("白名单"+url);
            return chain.filter(exchange);
        }
        //校验token
        String token = request.getHeaders().getFirst("token");
        if(token==null|| StringUtils.isEmpty(token)){
            System.out.println("token不存在"+url);
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }
        Claims body = Jwts.parser().setSigningKey("123456").parseClaimsJws(token).getBody();
        Integer userId = body.get("userId", Integer.class);
        String key="token-"+userId;
        String redistoken = redisTemplate.opsForValue().get(key);
        if(redistoken==null||StringUtils.isEmpty(redistoken)){
            System.out.println("redistoken不存在"+url);
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }
        if(!redistoken.equals(token)){
            System.out.println("token不正确"+url);
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }
        //续期
        System.out.println("token续期"+url);
        redisTemplate.expire(key,200, TimeUnit.MINUTES);
        //放行
        System.out.println("放行"+url);
        return chain.filter(exchange);
    }
}
